stock muffler from a different car?

Here is what I'm thinking....
I have a B16a2 swap on the way and need to get a new exhaust system because my current one has rusted in half. My thought was to have a custom center pipe made at an exhaust shop and buy a stock muffler that would go on some other type of car and have it hooked up to the custom center pipe.

I want a deeper sound than a stock civic exhaust but I have yet to hear an aftermarket exhaust that suits me. I used to have the Thermal stealth exhaust and it was too loud for my tastes plus I want a completely stock tailpipe apearance not some 6" can hanging off the back... just personal preference.

What if I got a muffler off of like an Audi TT (the 180 hp version) or a VW VR6. I love the sound of both of those cars. I know that one is a turbo and that one is a 6cyl but that would also mean that they have better flow than a civic exhaust as well.

has anyone ever heard of this being done? what are your thoughts on it? Where would be a good place to have the cutom work done, other than Midas, Meinike, etc.?

thanks
Sean